Syringe



March 4, 1952 P. s. MADSEN 2,588,135

SYRINGE Filed July 15, 1949 Zhmentor 004A S. W

(Ittomegs Patented Mar. 4, 1952 SYRINGE Paul S. Madsen, Bethany, Conn., assignor to The Seamless Rubber (loinpanm New Haven, Conn., a. corporation of Connecticut Application July 15, 1949, Serial No. 104,905 I 15 Claims. (Cl. 128232) This invention relates to syringes, and more particularly to vaginal syringes of the kind described in the Gow and Manville application, Serial No. 754,514, filed June 13, 1947, in which the article comprises a compressible bulb, a douche pipe, the douche pipe being reversible from its operative position so as to take a position in which it extends inwardly into the bulb. In this latter position the open butt end of the douche pipe is covered over by a closing cap, 3

and it is possible to carry about the syringe when the bulb is full of liquid.

One of the objects of the present invention is to provide an improved syringe of this type.

Another object is to improve the structure adjacent the connection of the pipe with the discharge portion of the bulb, with a view to increasing the protection against leakage of liquid from the bulb interior.

Another object is to provide a syringe of this type with means for preventing Spurting or geysering of liquid from the pipe with the bulb contains a quantity of liquid and the pipe is in the inwardly projecting position, at the time the closing cap is being removed.

In the accompanying drawing:

Fig. 1 is a side elevation of a syringe embodying the invention, showing the same as ready for transportation;

bulb, the douche pipe, and the cap being of the same kind. The present improvements relate especially to the structure employed at the discharge portion of the bulb for insuring against leakage of liquid from the bulb when the pipe is in the operative position and in the storedaway position, and to a structure or formation of the bulb bottom which cooperates with the pipe when the latter is in the stored position, as hereinafter described. The douche pipe-carries intermediate of its ends an enlarged portion,

generally cylindrical in shape, that is provided with screw threads so that the pipe can be screwed into a liner or bushing mounted in the discharge end of the bulb, and at the butt end of the pipe screw threads are provided for the attachment of the closing cap.

In the drawings, the body of the syringe is generally indicated at I0, the same comprising a bulb portion l I and a shield portion l2. The disj charge portionof the bulb is indicated at I3, the 'liner-or'bushing at [4, and the douche pipe at IS. The threaded enlargement on the douche pipe which screws into the liner I4 .is indicated at [6, the screw threads on the butt end portion of the douche pipe are indicated at I1, and the closing cap at 18. The douche pipe is similar to that disclosed in the Gow and Manville application, the same being provided with an interior bore 19 and having a bulbous end portion 20 provided with a central opening 2| in the tip, this opening being supplied with liquid squirted out through small perforations in an internal extension .22 within the bulbous portion and in communication with the bo re i 9.

Thedischarge portion l3 of the bulb is in the form of a bore or passage having such contour that the liner is received therein to provide the structure shown in Fig. 4. The liner is made of sheet metal or other suitable material, and preferably has a thin wall, and the same is placed in position relatively to the bulb by molding the rubber of the bulb about the liner. In the wall of the liner, intermediate of its ends, a screw thread 23 is directly formed or pressed,

adapted to be engaged by the screw-threaded enlargement 16 of the pipe. Referring to Fig. .4, thev upper end of the sheet metal liner is provided with an outwardly and downwardly bent anchoring flange 24 embedded for anchoring purposes in the wall of the shield portion [2. Above the liner (Fig. 4) thedischarge portion of the bulb has an open part 25 formed in the rubber, which is substantially aligned with the inner surface of the liner. At the lower end of the liner (Fig. 4) the same is formed or bent to provide a. portion 26 which is turned or curled in a radially inward direction for purposes of anchoring, and this curled end of the liner is embedded in a. rubber wall portion presenting a hole or opening 21 that is of substantially less diameter than the internal diameter of the liner body. In other words, the rubber wall is thickened in this region so as to embed the curled portion 26 andso as to provide in the rubber an opening 21 of decreased diameter. At the upper end (Fig. 4) of this portion of reduced diameter, and adjacent the lower border of the threaded portion of the liner, a sloping surface 28 is formed on the rubber so as to provide an upwardly and radially outwardly sloping seat against which the threaded enlargement of the douche pipe is adapted to engage for.the purpose of providing a sealing valve. This valve isformed in part by the rubber surface on seat 28, and in part by the sloping shoulder on the pipe. The pipe has two of these sloping shoulders, one of which, indicated. at 29,115 atone end of the part' It and acts to shut 01f liquid when the pipe is in .the position shown in Fig. 3, and the other of which, indicated at 30, acts when the pipe is in the" outwardly extended position. It will be apparent that, by the described construction, it will be impossible for liquid contained in the bulb to have access to any open space externally disposed with reference to the liner. It will also be apparent that it will be impossible for liquid which reaches the opening 21 from the bulb so that, even under hard usage, it cannot become displaced or work out of position. Dislocation of the liner is prevented by the curled portion 26, which prevents the liner from moving either longitudinally or laterally, and this part also serves as an inner reinforce for the part of the bulb provided with the inclined seat. The flange 24 at the other end of the liner also serves to prevent dislocation of the liner either longitudinally or laterally.

It will be noted that the rubber against which the enlargement of the douche pipe seats is integral with the rubber in the'bulb wall, and that the rubber in the bulb wall is so located as to prevent liquid from passing into a space around' is usually held in one hand while the other hand is used to unscrew the cap. Owing to the fact that the holding hand usually exerts some compressive action upon the bulb under these circumstances, there is a tendency for liquid to be squirted out of the butt end of the pipe as soon as the cap is released sufficiently to open the bore which it normally closes. In order to prevent spurting or geysering" of the syringe under these conditions, the present construction involves means in association with the bottom of the bulb which prevents entrance of liquid into the lower end of the pipe, or substantially impedes the entrance of liquid into the pipe, by way of the hole 2|, when the pipe has been screwed into the position of Fig. 3. For this purpose the bottom 3| of the bulb is provided with an upward projection 32 the upper surface of which is recessed,'as shown at 33, and shaped to present a shallow concavity and to engage the pipe nozzle in .the region around the hole 2| when the pipe is in thestored position. Thus, when the person holding the syringe in one hand exerts lateral pressure upon the bulb at the time the cap is being released, liquid cannot be forced into the lower end of the pipe, or at any rate cannot be forced into it in any substantial degree. Therefore, when the upper end of the pipe bore is opened or uncovered, there will be no spurting of liquid from the syringe. The sealing means herein shown, comprising the resilient rubber portion of the bulb, making contact with the nozzle in the region around the nozzle opening, acts to seal off the pipe sufiiciently to prevent spurting.

It will be understoodthat in manufacturing the syringe the liner of the discharge portion will be suitably positioned in a mold containing uncured rubber which is molded toform a shouldered portion embedding the lower end portion of the liner, and another portion embedding the flange at the upper end of the liner, the rubber containing suitable curing ingredients, and the rubber being 4 cured or vulcanized in any well-known manner. The term rubber is used in a broad and general sense.

The construction herein described is simple and relatively inexpensive, and for the stated reasons the improved syringe is more effective and convenient in operation than previously known devices.

Various changes can be made in the details without departing from the principles of the invention or the scope of the claims.

What I claim is:

1. In a syringe, an elastic bulb-like body having at one end a discharge portion, said discharge portion being in the form of a bore or passage forming a shoulder with the main cavity of the body, a bushing or liner mounted in said discharge portion and having its inner end embedded in said shoulder, said bushing being provided with a screw thread, and a douche pipe adapted to be screwed into said bushing and carrying valve means adapted to engage a valve seat provided upon said bulb body in a region adjacent said shoulder, said seat being located within the bushing at a point intermediate of the ends of the bushing.

2. In a syringe, an elastic bulb-like body having at one end a discharge portion, said discharge portion being in the form of a bore or passage forming a shoulder with the main cavity of the body, a, bushing or liner mounted in said discharge portion and having its inner end embedded in said shoulder, said bushing being provided with a screw thread, and a douche pipe adapted to be screwed into said bushing and carrying valve means adapted to engage a valve seat provided upon said bulb body in a region adjacent said shoulder, said seat being located within the bushing at a point intermediate of the ends of the bushing, the inner end of the bushing having an inwardly turned portion embedded in the material of the body.

3. In a syringe, a bulb-like body of rubber having at one end a discharge portion, a sheet metal bushing mounted in said discharge portion placed in position intermediate of the ends of the discharge portion and having an outwardly turned end flange at the outer end and an inturned portion at the inner end, said flange and said inturned portion being embedded in the rubber, said body having on an integral portion thereof located within the bushing a valve seat, and a douche pipe carrying means adapted to engage said seat in a leak-proof manner. 4. In a syringe, an elastic bulb-like body having at one end a discharge portion, a reversible douche pipe adapted to be screwed into said discharge porticn with the pipe in an inwardly extending position and having at its butt end portionprovisions for mounting a closing cap covermg the bore of the pipe, the distal end of said pipe being provided with an opening for the discharge of liquid, and means for closing said opening when the pipe is in the inwardly extending position, said means comprising'an inwardly extending portion provided upon said bulb-like body.

ering the bore of the pipe, the distal end of said pipe being provided with an opening for the discharge of liquid, and means for closing said opening when the pipe is in the inwardly extending position, said means comprising an inwardly extending portion provided upon said bulb-like body at the bottom of the body, said inwardly extending portion being adapted to make contact with the tip of the pipe around said opening.

6. In a syringe, an elastic bulb-like body having at one end a discharge portion, a reversible douche pipe adapted to be screwed into said discharge portion with the pipe in an inwardly extending position and having at its butt end por tion provisions for mounting a closing cap covering the bore of the pipe, the dista1 end of said pipe being provided with an opening for the discharge of liquid, and means for closing said opening when the pipe is in the inwardly extending position, said. means comprising an inwardly extending portion provided upon said bulb-like body at the bottom of the body, said inwardly extending portion being adapted to make contact with thetip of the pipe around said opening and presenting a shallow concavity in which the distal end of the pipe is received.

7. In a syringe, an elastic bulb-like body having a discharge portion, and a reversible hollow douche element adapted to be secured in said discharge portion with said element extending inwardly into the body and having at its butt end portion provisions. for mounting a closing cap closing off the interior of the douche element, the distal end of the douche element being provided with a liquid-discharging opening and said distal end in the secured inwardly extending position of said element abutting the bulb-like body to close said opening.

8. In a syringe, an elastic bulb-like body having at one end a discharge portion, and a reversible douche pipe adapted to be screwed into said discharge portion with the pipe in an inwardly extending position and having at its butt end portion provisions for mounting a closing cap covering the bore of the pipe, the distal end of the pipe being provided with a liquid-discharging opening and said distal end in the fully screwed-in position of the pipe engaging the wall of said body in a manner to close said opening.

9. In a syringe, an elastic bulb-like body having at one end a discharge portion in the form of a bore or passage forming a shoulder with the main cavity of the body, said bore or passage having adjacent its inner end a portion of less diameter than the remainder of the bore or passage, said portion being presented by a radially inwardly extending integral part of the body wall, said portion having at its upper or forward part a shoulder presenting a valve seat and the bore or passage above or forwardly of said seat being provided with a screw thread, and a douche pipe provided with an enlarged portion externally screw threaded and adapted to engage said screw thread, said enlarged portion presenting at one end thereof a valve shoulder adapted to engage said valve seat for sealing said discharge portion.

10. In a syringe, an elastic bulb-like body having a discharge portion, a screw-threaded bushing mounted in said discharge portion, a seat integral with said body and located internally of said bushing adjacent its radially inner part, and a douche pipe adapted to be secured into said bushing with the pipe in an outwardly projecting position or to be screwed into the bushing with the pipe in an inwardly extending position, said douche pipe carrying shouldered valve means which in either of the stated positions of said pipe makes contact with said seat to prevent leakage of liquid from the bulb.

11. In a syringe, an elastic bulb-like body having a discharge portion, a bushing having screw threads mounted in said discharge portion, a 7

seat integral with said body and located internally of the bushing, and a douche pipe adapted to be screwed into said bushing, said douche pipe carrying valve means coacting with said seat.

12. In a syringe, an elastic bulb-like body having a discharge portion, a bushing mounted in said discharge portion having screw threads, a seat integral with said body and located internally of said bushing at the inner end thereof, and a douche pipe adapted to be screwed into said bushing, said douche pipe carrying valve means coacting with said seat and said bushing having adjacent its outer end an external flange by which it is embedded and anchored in the material of said bulb-like body.

13. In a syringe, an elastic bulb-like body having a discharge portion, a bushing mounted in said discharge portion having screw threads, an annular seat which is integral with said bulblike body and located internally of said bushing, and a douche pipe adapted to be screwed into said bushing, said douche pipe carrying valve means coacting with said seat, and said bushing carrying at the respective ends anchoring members embedded in the material of said elastic body.

14. In a syringe, an elastic bulb-like body having a discharge portion, a bushing mounted in said discharge portion having screw threads, an annular seat which is integral with said bulblike body and located internally of said bushing, and a douche pipe adapted to be screwed into said bushing, said douche pipe carrying valve means coacting with said seat, and said bushing carrying at the respective ends anchoring members embedded in the material of said elastic body, the anchoring member adjacent the outer end of said bushing being an outturned member integral with the bushing and the anchoring member adjacent the inner end of the bushing being an inturned member integral with the bushing.

15. In a syringe, an elastic bulb-like body having a screw-threaded discharge portion, an annular seat integral with said body and located internally and between the ends of said discharge portion, and a douche pipe adapted to be screwed into said discharge portion, said douche pipe carrying an annular shoulder adapted to make contact with said seat to prevent leakage of liquid from the bulb-like body.

PAUL S. MADSEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 758,643 Haigh May 3, 1904 1,029,689 Kelley June 18 1912 1,070,717 Eggers Aug. 19, 1913 2,047,437 Sinkler July 14, 1936 2,299,769 Schulz Oct. 27, 1942 FOREIGN PATENTS Number Country Date 190,846 Switzerland July 16, 1937 656,220 Germany Jan. 31, 1938 432,842 Gmat Britain Aug. 2, 1935 

